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1943 - General Electric conveyer-type electric scale-free hardening furnace used to harden nuts and bolts in a midwestern industrial plant

SCALE-FREE HARDENING FURNACE

CD1963009 E&MP19.006

Electric Furnaces

March 13, 1943

General Electric conveyer-type electric scale-free hardening furnace used to harden nuts and bolts in a midwestern industrial plant.

The furnace is equipped with a tray loading device. 

Original Caption by Science Service
General Electric



National Museum of American History

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